Routine Fire Wx Fcst (With/Without 6-10 Day Outlook)
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
489
FNCA52 TJSJ 290846
FWFSJU
Fire Weather Planning Forecast for Puerto Rico
National Weather Service San Juan PR
446 AM AST Tue Jul 29 2025
.DISCUSSION...
Trailing moisture from the previous tropical wave will continue to
result in RH values above the fire danger thresholds from late
morning into late afternoon rounding at the lower 50s briefly at
some point early in the morning. Winds will continue from the
east -southeast at 15 to 18 mph and some gusty winds. given the
weather conditions, for today there will be a moderate risk for
fire danger threat along the southern coastal plains.
PRZ014-300900-
Southeast Coastal Plains-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Mclear
Precip Type Showers Showers Showers
Chance Precip (%) 20 10 10
Temp (24h trend) 92 (+2) 74 (-3) 92
RH % (24h trend) 52 (-13) 85 (-6) 44
Wind 20ft/early(mph) SE 17 G23 E 12 E 17 G23
Wind 20ft/late(mph) SE 17 G23 E 12 E 17 G23
Mixing Hgt(ft-agl/msl)4730 5530
Transport Wnd (mph) E 13 E 15
Vent Rate (kt-ft) 52030 71890
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ015-300900-
Southern Hills-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 30 20
Temp (24h trend) 89 (+3) 70 (-5) 88
RH % (24h trend) 63 (-7) 96 (+1) 57
Wind 20ft/early(mph) SE 12 E 10 E 12
Wind 20ft/late(mph) SE 12 E 10 E 12
Mixing Hgt(ft-agl/msl)5470 5990
Transport Wnd (mph) E 12 E 14
Vent Rate (kt-ft) 54700 71880
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ016-300900-
North Coastal Plains-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 10 10
Temp (24h trend) 91 (+2) 74 (-2) 89
RH % (24h trend) 67 (-4) 96 (-2) 63
Wind 20ft/early(mph) E 17 G19 E 14 NE 17 G19
Wind 20ft/late(mph) E 17 G19 E 14 NE 17 G19
Mixing Hgt(ft-agl/msl)4500 5190
Transport Wnd (mph) E 9 E 16
Vent Rate (kt-ft) 36000 72660
Dispersion 5 5
DSI 5 5 6
RH Recovery Excellent
Remarks...None.
$$
PRZ017-300900-
Northern Hills-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 50 30
Temp (24h trend) 89 (+1) 70 (-4) 87
RH % (24h trend) 68 (-3) 98 (-1) 66
Wind 20ft/early(mph) NE 14 E 11 NE 14
Wind 20ft/late(mph) NE 14 E 11 NE 14
Mixing Hgt(ft-agl/msl)5540 5660
Transport Wnd (mph) E 8 E 14
Vent Rate (kt-ft) 38780 67920
Dispersion 5 5
DSI 5 3 5
RH Recovery Excellent
Remarks...None.
$$
PRZ018-300900-
West Coast-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Showers
Chance Precip (%) 60 60 60
Temp (24h trend) 93 (+1) 71 (-4) 92
RH % (24h trend) 61 (-4) 100 (+3) 59
Wind 20ft/early(mph) E 11 E 11 SE 13
Wind 20ft/late(mph) E 11 E 11 SE 13
Mixing Hgt(ft-agl/msl)4660 5280
Transport Wnd (mph) E 8 E 9
Vent Rate (kt-ft) 32620 42240
Dispersion 5 5
DSI 5 4 5
RH Recovery Excellent
Remarks...None.
$$
PRZ019-300900-
Eastern Interior-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 40 20 20
Temp (24h trend) 89 (+2) 72 (-4) 88
RH % (24h trend) 67 (-3) 94 (-3) 62
Wind 20ft/early(mph) E 12 E 11 E 12
Wind 20ft/late(mph) E 12 E 11 E 12
Mixing Hgt(ft-agl/msl)5850 6380
Transport Wnd (mph) E 12 E 14
Vent Rate (kt-ft) 58500 76560
Dispersion 5 5
DSI 5 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ022-300900-
Luquillo Mountain Range-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 20 20
Temp (24h trend) 85 (+4) 70 (-3) 84
RH % (24h trend) 75 (-6) 98 (-2) 69
Wind 20ft/early(mph) E 11 E 9 E 10
Wind 20ft/late(mph) E 11 E 9 E 10
Mixing Hgt(ft-agl/msl)3960 4550
Transport Wnd (mph) E 12 E 14
Vent Rate (kt-ft) 39600 54600
Dispersion 5 5
DSI 6 4 6
RH Recovery Excellent
Remarks...None.
$$
PRZ023-300900-
Central Mountain Range-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Tstms Tstms Showers
Chance Precip (%) 70 60 40
Temp (24h trend) 87 (+3) 67 (-5) 86
RH % (24h trend) 67 (-6) 100 (+1) 66
Wind 20ft/early(mph) E 8 E 8 E 10
Wind 20ft/late(mph) E 8 E 8 E 10
Mixing Hgt(ft-agl/msl)6080 7110
Transport Wnd (mph) E 9 E 10
Vent Rate (kt-ft) 48640 63990
Dispersion 5 5
DSI 5 2 5
RH Recovery Excellent
Remarks...None.
$$
PRZ024-300900-
Cayey Mountain Range-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 20 20
Temp (24h trend) 85 (+2) 70 (-3) 85
RH % (24h trend) 72 (-2) 98 (-2) 65
Wind 20ft/early(mph) E 11 E 9 E 11
Wind 20ft/late(mph) E 11 E 9 E 11
Mixing Hgt(ft-agl/msl)4840 5510
Transport Wnd (mph) E 13 E 15
Vent Rate (kt-ft) 53240 71630
Dispersion 5 5
DSI 6 3 6
RH Recovery Excellent
Remarks...None.
$$
PRZ025-300900-
Vieques-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 60 10 20
Temp (24h trend) 90 (+1) 77 (-2) 90
RH % (24h trend) 61 (-4) 86 (-7) 57
Wind 20ft/early(mph) E 13 G17 E 14 G19 E 13
Wind 20ft/late(mph) E 13 G17 E 14 G19 E 13
Mixing Hgt(ft-agl/msl)2900 4080
Transport Wnd (mph) E 16 E 17
Vent Rate (kt-ft) 40600 61200
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ026-300900-
Culebra-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 10 20
Temp (24h trend) 91 (+2) 77 (-3) 90
RH % (24h trend) 63 (-7) 87 (-5) 61
Wind 20ft/early(mph) E 13 G17 E 13 G17 E 13 G18
Wind 20ft/late(mph) E 13 G17 E 13 G17 E 13 G18
Mixing Hgt(ft-agl/msl)2780 4000
Transport Wnd (mph) E 17 E 18
Vent Rate (kt-ft) 41700 64000
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
PRZ027-300900-
Southwest Coastal Plains and Mona Island-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Pcldy Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 30 40 30
Temp (24h trend) 93 (+2) 74 (-4) 92
RH % (24h trend) 52 (-10) 91 (+4) 45
Wind 20ft/early(mph) SE 16 G22 E 16 G19 SE 17 G22
Wind 20ft/late(mph) SE 16 G22 E 16 G19 SE 17 G22
Mixing Hgt(ft-agl/msl)5020 5610
Transport Wnd (mph) E 13 E 13
Vent Rate (kt-ft) 55220 61710
Dispersion 5 5
DSI 6 5 5
RH Recovery Excellent
Remarks...None.
$$
VIZ001-300900-
Saint Thomas and Saint John-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Mclear Pcldy
Precip Type Tstms Showers Showers
Chance Precip (%) 50 10 20
Temp (24h trend) 86 (+2) 75 (-4) 88
RH % (24h trend) 69 (-9) 95 (0) 65
Wind 20ft/early(mph) E 14 G19 E 14 G19 E 14 G17
Wind 20ft/late(mph) E 14 G19 E 14 G19 E 14 G17
Mixing Hgt(ft-agl/msl)2900 3560
Transport Wnd (mph) E 17 E 18
Vent Rate (kt-ft) 43500 56960
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
VIZ002-300900-
St Croix-
446 AM AST Tue Jul 29 2025
Today Tonight Wed
Cloud Cover Pcldy Mclear Pcldy
Precip Type Showers Showers Showers
Chance Precip (%) 40 10 50
Temp (24h trend) 90 (+3) 76 (-3) 90
RH % (24h trend) 60 (-12) 92 (-2) 60
Wind 20ft/early(mph) E 14 G18 E 16 G19 E 13
Wind 20ft/late(mph) E 14 G18 E 16 G19 E 13
Mixing Hgt(ft-agl/msl)3880 4600
Transport Wnd (mph) E 17 E 16
Vent Rate (kt-ft) 58200 64400
Dispersion 5 5
DSI 6 6 6
RH Recovery Excellent
Remarks...None.
$$
$$